对文本数据进行预处理,例如去除标点符号、小写转换、词干提取等。 fromnltk.corpusimportstopwordsfromnltk.stemimportPorterStemmerfromnltk.tokenizeimportword_tokenize# 去除标点符号defremove_punctuation(text):return''.join(cforcintextifcnotinstring.punctuation)# 小写转换defto_lower(text):returntext.lower()# 词...
(text): # Lowercase the text text = text.lower() # Remove punctuation and digits text = text.translate(str.maketrans('', '', string.punctuation + string.digits)) # Tokenize the text words = word_tokenize(text) # Remove stop words words = [word for word in words if word not in ...
text="".join(text.split())#使所有文本为小写text =text.lower() text="".join([stemmer.stem(word)forwordintext.split()])#删除标点符号remove_punc = re.compile(r"[%s]"%re.escape(string.punctuation)) text= remove_punc.sub('', text)#删除停止字text ="".join([wordforwordinstr(text).sp...
new_s = s.translate(table) # Output: string without punctuation 1. 2. 3. 4. 小纸条:你不需要理解做一dict键映射到给定的dictof a None;{key: None for key in string.punctuation}可以取代这是一个dict.fromkeys(string.punctuation)所有工作在C层有一个单一的呼叫。 "谢谢你shadowranger,此更新。 1...
['Hello, NLP world!','!','In this example, we are going to do the basics of Text processing which will be used later.'] 1. 删除不需要的字符、标点符号、符号等。 importstringdefremove_punctuation(input_string):# 定义一系列标点符号和符号punctuations=string.punctuation# 从输入字符串中删除标点...
i] # tokenize desc = desc.split() # convert to lower case desc = [word.lower() for word in desc] # remove punctuation from each token desc = [w.translate(table) for w in desc] # remove hanging 's' and 'a' desc = [word for word in desc if len(word)> 1 ] # remove ...
df['tokens'] = df['text'].apply(word_tokenize) 定义一个函数以删除标点符号: 代码语言:txt 复制 def remove_punctuation(tokens): tokens_without_punct = [token for token in tokens if token not in string.punctuation] return tokens_without_punct 应用该函数以删除标点符号: 代码语言:txt 复制 ...
``` # Python script to generate random text import random import string def generate_random_text(length): letters = string.ascii_letters + string.digits + string.punctuation random_text = ''.join(random.choice(letters) for i in range(length)) return random_text ``` 说明: 此Python脚本生成...
```# Python script to generate random textimport randomimport stringdef generate_random_text(length):letters = string.ascii_letters + string.digits + string.punctuationrandom_text = ''.join(random.choice(letters) for i in range(le...
import string print(string.digits) 执行结果: 0123456789 #punctuation:生成所有标点符号。 import string print(string.punctuation) 执行结果: !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~ 13.openpyxl 13.1 读Excel from openpyxl import load_workbook wb = load_workbook("files/p1.xlsx") sheet = wb...